B. Luy et al., Analytical polarization transfer functions for four coupled spins 1/2 under isotropic mixing conditions, J MAGN RES, 138(1), 1999, pp. 19-27
Analytical polarization transfer functions are presented for spin systems c
onsisting of four spins 1/2 with arbitrary coupling constants under isotrop
ic mixing conditions. In addition, simplified transfer functions were deriv
ed for symmetric coupling topologies. Based on these transfer functions opt
imal durations for the mixing period can be determined for correlations of
interest. (C) 1999 Academic Press.